Carburation and means therefor



March 20, 1934. R. B. SMITH CARBURATION AND MEANS THEREFOR Filed Dec. 22. 1932 IN VEN TO R.

1 5410 ATTORNEY:

Patented Mar. 20, 1934 1 CARBURATION AND MEANS THEREFOR Robert B. Smith, Pittsburgh, Pa.

Application December 22, 1932, Serial No. 648,404

2 Claims.

My invention relates to the art of carburation for internal combustion engines, especially as used with motor driven vehicles.

Ordinarily, the engine fuel, as gasoline, is furnished by a carburetor in which the liquid gasoline is vaporized in combination with an incoming supply of atmospheric air. The gasoline supply and the air supply are regulated and proportioned by well known common means, the air entering through an open conduit in the form of a directly moving column from the outside.

Under such conditions the gasoline is vaporized and combined with the air under suction of the cylinder plungers, and enters the explosion chamhers theoretically in the proper proportions of 1 to 15. However practice has shown material and various irregularities in operation of the motor due to imperfect mixing and variation in proportions, with resulting defects in practice, resulti ing in waste of energy and fuel value.

My invention provides novel means for thorough, regular and constant mixture of the air with the vaporized fuel, by imparting to the incoming air column a swirling or spinning movement.

The whirling air envelops and combines with the atomized gasoline, picking up the small particles, and thus providing a constant stream of combustible mixture for supply to the engine cylinders.

In the drawings showing one preferred embodiment of means adapted to carrying out the invention:

Fig. 1 is a view in side elevation, partly in section, showing a carburetor provided with the air swirling improvement;

Fig. 2 is a cross section on the line I[-II of Fig. 1;

Fig. 3 is a detail view in elevation showing a separately applied air swirling attachment.

A represents a conventional carburetor of any suitable design provided with the float chamber 2 and the gasoline supply connection 3, from the interior 4 of which chamber the gasoline is supplied from the terminal 5 of the usual needle valve controlled conduit 6, as is well understood. The vaporized gasoline, mixed with air, passes upwardly through the duct or connection 7, having the conventional check damper 8 to connec- Ttion 9 of the usual manifold 10, from which the mixture is distributed in the usual way to the explosion chambers of the several cylinders, as in usual practice.

Ordinarily, the carburetor is provided with a 1i conduit extension 11 communicating with the outside atmosphere for an incoming current of air induced by the engine suction, for combination with the vaporized gasoline. In my invention the conduit 11 is elongated, as at 11a, for any suitable length sufiicient for installation of the spirally arranged middle partition 12.

Such partition, as shown, is made of a continuously plane thin metal strip and divides the interior of the conduit into a pair of uniform continuously smooth side by side semi-cylindrical inlet chambers of constantly varying spiral direction, due to the uniform twist or bending of the partition from one end to the other. By such construction the partition 12 is continuously straight and smooth transversely of the conduit at all points throughout its length. The partition is spirally twisted lengthwise for less than a full turn, and preferably has one-half turn throughout its length which I have found amply suflicient. Also as shown the inner end of the partition should be parallel with the axis of the duct 7 so that the column of air entering the carburetor is equally divided into a pair of closely adjacent continuously rotating sections along and around the longitudinal axis of the conduit. The partition is entirely within the tube or conduit and the particular positioning of the partition is of practical advantage and enhances uniform distribution and admixture of the gas and whirling air stream.

The conduit 1111 may be an integral continuation or extension of the usual inlet conduit 11, and may be provided with any suitable damper or regulating device for variation in the air condition due to weather, etc. Qtherwise it may be in the form of a separate tubular attachment 111) as in Fig. 3, having a telescoping or other suitable connection 13 with the main carburetor shell, as indicated.

By such construction, upon the creation of suction by piston action and resulting induced flow of gasoline, incoming air indicated by the arrow 0, enters the mixing chamber of the carburetor at the induced rate of flow, and with the swirling or spinning movement induced by the spiral partition 12. There is thus created an enveloping body of swirling air moving inwardly and upwardly through the mixing chamber of the carbureter. By thus thoroughly mixing the vaporized gasoline with the air supply, more uniform combustion of the mixture is insured, improving the engine performance, giving faster acceleration, greater and more uniform power, and resulting economy and increased mileage from the fuel.

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not to exceed one spiral between their ends.

2. In combination with a carbureter having an outlet and inlet, a duct connecting the outlet with the intake manifold, an air intake conduit connected with the inlet of the carbureter and disposed approximately perpendicular to the duct, a longitudinally disposed partition arranged entirely within said conduit and longitudinally twisted not exceeding one spiral between its ends to divide the conduit into two parallel spiraled air passages, the inner end of said partition being parallel with the axis of said duct.

ROBERT B. SMITH. 

